Alphabetic Index FY2027

Y23

Rifle, shotgun and larger firearm discharge, undetermined intent

FY2027Chapter 20: External causes of morbidity/Y21–Y33 Event of undetermined intent

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

Y23 is a non-billable ICD-10-CM code category for rifle, shotgun and larger firearm discharge, undetermined intent. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are Y23.0 Shotgun discharge, undetermined intent; Y23.1 Hunting rifle discharge, undetermined intent; Y23.2 Military firearm discharge, undetermined intent; Y23.3 Machine gun discharge, undetermined intent and 2 more. Its coding notes include 1 Excludes2 entry.

7th characters

Every code below needs one of these.

The appropriate 7th character is to be added to each code from category Y23

  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Guidelines tips

From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.

An external cause code is never a principal or first-listed diagnosis. Its 7th character is assigned for each encounter and should match the injury or condition code.

Guidelines I.C.20.a.2; I.C.20.a.6External cause codesRead the official text

If the intent is unknown or unspecified, it is coded as accidental. Undetermined intent codes are used only when the record says the intent cannot be determined.

Guidelines I.C.20.hUnknown or undetermined intentRead the official text

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

This code

Notes

Also from chapter/block level (1 note)
Inherited from Chapter 20 External causes of morbidity
  • This chapter permits the classification of environmental events and circumstances as the cause of injury, and other adverse effects. Where a code from this section is applicable, it is intended that it shall be used secondary to a code from another chapter of the Classification indicating the nature of the condition. Most often, the condition will be classifiable to Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88). Other conditions that may be stated to be due to external causes are classified in Chapters I to XVIII. For these conditions, codes from Chapter 20 should be used to provide additional information as to the cause of the condition.

More specific codes under Y23 6